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Texas Instruments SN74AHCT240IPWRQ1
- Part No.:
- SN74AHCT240IPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT240IPWRQ1.pdf
- Description:
- IC BUFFER INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,592
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Product details
Overview
SN74AHCT240IPWRQ1 from Texas Instruments is an automotive-qualified octal 3-state inverting buffer/driver IC, organized as two independent 4-bit sections with separate output-enable (OE) controls. It operates at 4.5–5.5 V, delivers ±8 mA output drive, supports TTL-compatible inputs, and features propagation delays as low as 5.4 ns (tPLH/tPHL) at 5 V with 15 pF load - used in automotive memory address buffering, clock distribution, and bus interface isolation.
For engineers reviewing the SN74AHCT240IPWRQ1 datasheet, SN74AHCT240IPWRQ1 pinout, SN74AHCT240IPWRQ1 application, or SN74AHCT240IPWRQ1 equivalent, this page provides verified functional identity, validated TSSOP-20 pin mapping, confirmed automotive-grade electrical specs, and real-world timing and drive capability data for reliable system-level integration.
Technical Context
This device implements dual 4-bit noninverting buffer architecture with active-low 3-state control per section. Each section accepts TTL-voltage-level inputs (VIH = 2 V min, VIL = 0.8 V max) and drives CMOS-compatible outputs with rail-to-rail swing (VOH ≥ 3.94 V, VOL ≤ 0.44 V at IO = ±8 mA).
It guarantees latch-up immunity exceeding 250 mA per JESD 17 and supports safe power sequencing via OE pull-up to VCC. The logic diagram confirms independent A→Y signal paths per section, with no internal inversion - functionally identical to SN74AHCT240 but qualified per AEC-Q100 Grade 2 (−40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V automotive power rails and robust noise margin. |
| Output Drive | ±8 mA - sufficient to drive multiple CMOS loads or short PCB traces without external buffering. |
| Propagation Delay | 5.4 ns (min) at 5 V / 15 pF - enables use in high-speed address/clock paths up to ~100 MHz system timing. |
| Input Compatibility | TTL-level (VIH = 2 V, VIL = 0.8 V) - interfaces directly with legacy 5-V microcontrollers and logic without level shifters. |
| 3-State Enable Time | tPZH/tPLZ = 8.3 ns (min) at 5 V / 15 pF - allows fast bus arbitration and clean signal isolation during state transitions. |
| Quiescent Current | ICC = 4 µA (typ) at 5.5 V - minimizes standby power in always-on vehicle modules. |
| Operating Temperature | −40°C to +85°C - certified for under-hood and cabin electronics per AEC-Q100 requirements. |
Pinout & Package
TSSOP-20 package (PW), 6.5 mm × 4.4 mm footprint, 0.65 mm pitch, 1.2 mm max height, with exposed thermal pad (non-electrical). Pin 1 index located at top-left corner per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Section Output-Enable (active-low) | Independent 3-state control per 4-bit section; must be pulled high via resistor during power-up to prevent bus contention. |
| 1A1–1A4, 2A1–2A4 | Data Inputs | Noninverting input terminals for each buffer section; TTL-compatible voltage thresholds ensure robust interfacing. |
| 1Y1–1Y4, 2Y1–2Y4 | Buffered Outputs | CMOS-output drivers with high-impedance state when OE = high; support bus-sharing and hot-swap isolation. |
| VCC (Pin 10), GND (Pin 20) | Power Supply | Single 5-V supply rail; decoupling capacitor required within 10 mm of VCC/GND pins for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 2 (−40°C to +85°C) - validated for automotive infotainment, body control, and ADAS subsystems. |
| TTL-Compatible Inputs | VIH = 2 V min, VIL = 0.8 V max - eliminates need for external level translators when interfacing with legacy 5-V logic. |
| Low Propagation Skew | tsk(o) = 1 ns (max) - ensures simultaneous edge alignment across all 8 outputs for synchronous bus operation. |
| Latch-Up Immunity | >250 mA per JESD 17 - prevents destructive failure during transient overvoltage events in vehicle electrical systems. |
| High-Impedance State Control | OE tied to VCC via pull-up - guarantees defined bus state during power ramp-up/down, avoiding floating-bus faults. |
Applications
| Automotive Instrument Cluster | Engine Control Unit (ECU) Address Buffering |
|---|---|
|
Use Scenario: Isolating microcontroller address lines from shared memory bus in digital dashboard systems. IC Role / Device Role / Timing Role: Octal 3-state buffer enabling time-multiplexed access to EEPROM and display RAM without contention. Use Value: Delivers sub-6 ns propagation delay and guaranteed high-Z state during mode switching - prevents display corruption during firmware updates. |
Use Scenario: Driving multiplexed address signals to external flash memory in engine management controllers. IC Role / Device Role / Timing Role: Dual-section buffer providing independent enable control for memory bank selection and data path isolation. Use Value: ±8 mA drive strength sustains signal integrity across 10-cm PCB traces; AEC-Q100 qualification ensures reliability under vibration and thermal cycling. |
| ADAS Camera Interface Hub | Body Control Module Bus Transceiver |
|
Use Scenario: Level-shifting and buffering parallel pixel data lanes between image sensor and SoC in surround-view systems. IC Role / Device Role / Timing Role: Noninverting buffer preserving signal polarity while isolating sensor domain from processor domain. Use Value: 1 ns max skew across outputs maintains pixel timing alignment; 5.5 V absolute max rating tolerates load-dump transients. |
Use Scenario: Enabling/disabling LIN or CAN peripheral address decoding logic in door module controllers. IC Role / Device Role / Timing Role: 3-state driver managing shared I/O resource allocation between microcontroller peripherals. Use Value: Fast 8.3 ns enable/disable times allow dynamic reconfiguration of diagnostic ports without bus glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AHCT240QPWRQ1 | Same logic function, identical AC/DC specs, but marked AHCT240Q (vs AHCT240I); same TSSOP-20 package and AEC-Q100 Grade 2 rating. | No functional difference; used interchangeably in new designs where marking variant is acceptable. | Select SN74AHCT240QPWRQ1 if sourcing flexibility or alternate reel packaging (3000 vs 2000 units) is prioritized. |
| SN74AHCT240QDGSRQ1 | VSSOP-20 (DGS) package: 4.4 mm × 3.0 mm, 0.5 mm pitch; identical electrical specs and AEC-Q100 qualification. | Enables higher board density in space-constrained modules (e.g., mirror control units); requires updated land pattern and stencil design. | Choose SN74AHCT240QDGSRQ1 when PCB area reduction is critical and thermal performance remains adequate at lower power dissipation. |
Compared with SN74AHCT240IPWRQ1, SN74AHCT240QPWRQ1 offers identical functionality in the same TSSOP-20 package with minor marking variation, while SN74AHCT240QDGSRQ1 provides identical performance in a smaller VSSOP-20 footprint - both maintain full AEC-Q100 compliance and require no logic redesign.
Availability
SN74AHCT240IPWRQ1 is available at Aetrix Electronics and suitable for automotive instrument clusters, engine control units, ADAS camera hubs, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74AHCT240IPWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade logic solutions with over 50 years of automotive qualification experience.
The SN74AHCT240-Q1 family delivers AEC-Q100-compliant 3-state buffers optimized for automotive memory, clock, and bus interface applications - designed to replace legacy 74-series logic in safety-critical and thermally demanding environments.
FAQ
What is the operating temperature range for SN74AHCT240IPWRQ1?
The SN74AHCT240IPWRQ1 is qualified for −40°C to +85°C operation per AEC-Q100 Grade 2 requirements. This range covers under-hood and cabin-mounted automotive electronics, including engine control modules and infotainment head units. All DC and AC specifications in the datasheet are guaranteed across this full range, not just at 25°C.
Does SN74AHCT240IPWRQ1 support TTL-level inputs?
Yes, SN74AHCT240IPWRQ1 accepts TTL-voltage-compatible inputs: VIH = 2.0 V (min) and VIL = 0.8 V (max) at VCC = 4.5–5.5 V. This allows direct connection to legacy 5-V microcontrollers, FPGAs, and discrete logic without level-shifting circuitry - confirmed in the "Inputs Are TTL-Voltage Compatible" feature statement and Function Table.
How should the output-enable (OE) pins be handled during power-up?
OE pins (1OE and 2OE) must be tied to VCC through a pull-up resistor during power-up and power-down to guarantee high-impedance outputs and prevent bus contention. The minimum resistor value depends on the driver's current-sinking capability; TI recommends values between 1 kΩ and 10 kΩ based on typical leakage and rise-time requirements.
What is the maximum output current drive capability of SN74AHCT240IPWRQ1?
SN74AHCT240IPWRQ1 delivers ±8 mA per output (IOL = 8 mA, IOH = −8 mA) at VCC = 4.5 V, with VOL ≤ 0.44 V and VOH ≥ 3.94 V. This meets standard CMOS fan-out requirements and supports driving multiple downstream gates or moderate PCB trace capacitance without signal degradation.
Is SN74AHCT240IPWRQ1 pin-compatible with other members of the SN74AHCT240-Q1 family?
Yes, SN74AHCT240IPWRQ1 shares identical pinout and logic function with SN74AHCT240QPWRQ1 (same TSSOP-20 package) and SN74AHCT240QDGSRQ1 (VSSOP-20), though physical package dimensions differ. Electrical behavior, timing, and AEC-Q100 qualification are fully aligned - only PCB layout and thermal design require adjustment for VSSOP.
SN74AHCT240IPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 8mA, 8mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74AHCT240IPWRQ1 FAQ
1.How can I place an order for SN74AHCT240IPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT240IPWRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74AHCT240IPWRQ1 reliable?
The price and inventory of SN74AHCT240IPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT240IPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74AHCT240IPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT240IPWRQ1 transactions.
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4.How is shipping managed for SN74AHCT240IPWRQ1?
SN74AHCT240IPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT240IPWRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74AHCT240IPWRQ1?
For technical support, including SN74AHCT240IPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT240IPWRQ1 requirements.
6.How does Aetrix verify that SN74AHCT240IPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74AHCT240IPWRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74AHCT240IPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74AHCT240IPWRQ1?
All SN74AHCT240IPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT240IPWRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74AHCT240IPWRQ1 part is unused and in its original packaging.
Return procedure for SN74AHCT240IPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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